(1) MC Hammer sold MORE ALBUMS by a landslide...OBJECTIVELY speaking, he made "better music" because more people consumed his music than Master Ace's...
Yes, its true Hammer sold more albums than Ace, that is not debateable, however are album sales the only relevant factor in judging ability or greatness? I don't think so at all, they are only one aspect.
Objectively speaking, Hammer had an extremely hot run that ended very quickly as well, there was no longevity to his career, another and IMO a more important aspect in measuring greatness. Hammer couldn't duplicate a fraction of that success ever again and if he released an album now, it wouldn't sell more than a Master Ace album would. Also, you are mistaking popularity for quality. Just because more people consumed his music does not mean it was better or of a higher quality, only that more people supported it.
(2) MC Hammer had a FAR BETTER career than Master Ace...He was FAR MORE successful...Going broke does not negate what he achieved with his music...
Objectively, how do you measure success? I don't consider making millions and ending up broke and blackballed from the industry that made you famous as "successful". If your goal is to be FAMOUS, then yes you could say Hammer was more successful, but if you say your goal was to make multiple classic albums, have an extensive catalogue of music, to be respected musically by your peers and fans and to have a long career doing something you enjoy, then any of all of those things Ace trumps Hammer in.
This is NOT a Master Ace vs MC Hammer thread...
All I am stating is that there are MORE rappers deserving of Top 10 status than Master Ace, because those rappers had FAR MORE success...
You seem to be judging greatness or status merely by popularity.... Why?
There are NUMEROUS ways a person can be successful, most without achieving anything you said. You ask most people in the rap game what are their biggest goals in the industry and the 3 biggest things you get are "Money, Power and Respect". Ace trumps Hammer in ALL of those catergories, how can Ace NOT be considered better than Hammer?